<template>
  <div class="cart">
    <order-header title="我的购物车">
      <template v-slot:tip>
        <span>温馨提示：产品是否购买成功，以最终下单为准哦，请尽快结算</span>
      </template>
    </order-header>
    <div class="wrapper">
      <div class="container">
        <div class="cart-box">
          <ul class="cart-item-head">
            <li class="col-1"><span class="checkbox" :class="{'checked':allChecked}" @click="toggleAll"></span>全选</li>
            <li class="col-3">商品名称</li>
            <li class="col-1">单价</li>
            <li class="col-2">数量</li>
            <li class="col-1">小计</li>
            <li class="col-1">操作</li>
          </ul>
          <ul class="cart-item-list">
            <li class="cart-item" v-for="(item,index) in list" :key="index">
              <div class="item-check">
                <span class="checkbox" :class="{'checked':item.productSelected}" @click="updateCart(item)"></span>
              </div>
              <div class="item-name">
                <img v-lazy="item.productMainImage" alt="" />
                <span>{{item.productName + ',' + item.productSubtitle}}</span>
              </div>
              <div class="item-price">{{item.productPrice}}</div>
              <div class="item-num">
                <div class="num-box">
                  <a href="javascript:;" @click="updateCart(item,'-')">-</a>
                  <span>{{item.quantity}}</span>
                  <a href="javascript:;" @click="updateCart(item,'+')">+</a>
                </div>
              </div>
              <div class="item-total">{{item.productTotalPrice}}</div>
              <div class="item-del" @click="delProduct(item)"></div>
            </li>
          </ul>
        </div>
        <div class="order-wrap clearfix">
          <div class="cart-tip fl">
            <a href="/#/index">继续购物</a>
            共<span>{{list.length}}</span>件商品，已选择<span>{{checkedNum}}</span>件
          </div>
          <div class="total fr">
            合计：<span>{{cartTotalPrice}}</span>元
            <a href="javascript:;" class="btn" @click="order">去结算</a>
          </div>
        </div>
      </div>
    </div>
    <service-bar></service-bar>
    <nav-footer></nav-footer>
  </div>
</template>

<script>
import OrderHeader from "../components/OrderHeader";
import NavFooter from "../components/NavFooter";
import ServiceBar from "../components/ServiceBar";
export default {
  name: "cart",
  components: {
    OrderHeader,
    NavFooter,
    ServiceBar,
  },
  data() {
    return {
      list:[],//商品列表
      allChecked:false,//是否全选
      cartTotalPrice:0,//商品总金额
      checkedNum:0,//选中商品数量
    }
  },
  mounted() {
    this.getCartList()
  },
  methods: {
    // 获取购物车列表
    getCartList(){
      this.axios.get('/carts').then((res) => {
        this.renderData(res)
      })
    },
    // 购物车商品数量改变的相关操作
    updateCart(item,type){
      let quantity = item.quantity
      let selected = item.productSelected
      if(type == '-'){
        if(quantity == 1){
          this.$message.warning('商品至少保留一件')
          return
        }
        --quantity
      }else if(type == '+'){
        if(quantity > item.productStock){
          this.$message.warning('商品库存不足')
          return
        }
        ++quantity
      }else{
        selected = !item.productSelected
      }
      this.axios.put(`/carts/${item.productId}`,{
        quantity,
        selected
      }).then(res => {
        this.renderData(res)
      })
    },
    // 删除商品
    delProduct(item){
      this.axios.delete(`/carts/${item.productId}`).then(res => {
        this.$message.success('删除成功')
        this.renderData(res)
      })
    },
    // 控制全选功能
    toggleAll(){
      let url = this.allChecked?'/carts/unSelectAll':'/carts/selectAll'
      this.axios.put(url).then(res => {
        this.renderData(res)
      })
    },
    // 抽离调用接口部分的方法
    renderData(res){
      this.list = res.cartProductVoList || []
        this.allChecked = res.selectedAll
        this.cartTotalPrice = res.cartTotalPrice
        this.checkedNum = this.list.filter(item => item.productSelected).length
    },
    order(){
      let isCheck = this.list.every(item=>!item.productSelected)
      if(isCheck){
        this.$message.warning('请选择一件商品')
      }else{
        this.$router.push('/order/confirm')
      }
    }
  },
};
</script>

<style lang="scss">
@import "../assets/scss/config.scss";
@import "../assets/scss/mixin.scss";
.cart {
  .wrapper {
    background-color: $colorJ;
    padding-top: 33px;
    padding-bottom: 114px;
    .cart-box {
      background-color: $colorG;
      font-size: $fontJ;
      color: $colorD;
      text-align: center;
      .checkbox {
        display: inline-block;
        width: 22px;
        height: 22px;
        border:1px solid $colorH;
        vertical-align: middle;
        margin-right: 17px;
        cursor: pointer;
        &.checked {
          background: url("/imgs/icon-gou.png") $colorA no-repeat center;
          background-size: 16px 12px;
          border: none;
        }
      }
      .cart-item-head {
        display: flex;
        height: 79px;
        line-height: 79px;
        .col-1 {
          flex: 1;
        }
        .col-2 {
          flex: 2;
        }
        .col-3 {
          flex: 3;
        }
      }
      .cart-item-list {
        .cart-item {
          display: flex;
          align-items: center;
          height: 125px;
          border-top: 1px solid #e5e5e5;
          font-size: $fontI;
          .item-check {
            flex: 1;
          }
          .item-name {
            flex: 3;
            font-size: $fontH;
            color: $colorB;
            display: flex;
            align-items: center;
            img {
              width: 80px;
              height: 80px;
              vertical-align: middle;
            }
            span {
              margin-left: 30px;
            }
          }
          .item-price {
            flex: 1;
            color: $colorB;
          }
          .item-num {
            flex: 2;
            .num-box {
              display: inline-block;
              width: 150px;
              height: 40px;
              border: 1px solid $colorH;
              line-height: 40px;
              font-size: $fontJ;
              a {
                display: inline-block;
                width: 50px;
                color: $colorB;
              }
              span {
                display: inline-block;
                width: 50px;
                color: $colorB;
              }
            }
          }
          .item-total {
            flex: 1;
            color: $colorA;
          }
          .item-del {
            flex: 1;
            @include bgImg(14px, 12px, "/imgs/icon-close.png");
            cursor: pointer;
          }
        }
      }
    }

    .order-wrap {
      height: 50px;
      line-height: 50px;
      font-size: $fontJ;
      color: $colorC;
      margin-top: 20px;

      .cart-tip {
        margin-left: 29px;
        a {
          color: $colorC;
          margin-right: 37px;
        }
        span {
          color: $colorA;
          margin: 0 5px;
        }
      }
      .total {
        font-size: $fontJ;
        color: $colorA;
        span {
          font-size: 24px;
        }
        a {
          width: 202px;
          height: 50px;
          line-height: 50px;
          font-size: $fontH;
          margin-left: 37px;
        }
      }
    }
  }
}
</style>